I have a stack with a mixture of CISCO switches: 2x3508 + 2x3524 + 1x3550. It is working.
The problem is that I need to add another 3550 in stack and when I am doing that, the old 3550 stops responding to the network. GBIC ports for both 3550 are configured with "nonegotiate". actual 3550 is reporting for stack module : half-duplex - 1000Mb/s.
When I am connecting the new 3550 : the old 3550 stack port is going automatically to full duplex and I can not do anything to keep it half.
Both 3550 are running SMI images: 121-8.EA1c.
Does someone seen this before?
Can someone help me?
(I do not have budget to change whole stack...) :)
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